Mahasti Kalantar, MD
Internal Medicine Physician · Lafayette, CO
Mahasti Kalantar, MD is an internal medicine physician with a practice address in Lafayette, Colorado, and NPI 1598865313, issued on Sep 22, 2006. Check the license (Colorado 40768, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mahasti Kalantar
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 40768 CO
Self-reported in NPPES; status is on the state search - Practice location
- 200 Exempla Cir, Lafayette, CO 80026
- Phone
- (303) 338-4545
- Enumerated
- Sep 22, 2006
- Record last updated
- Jun 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 19278373 CO
- Medicare enrollment
- Enrolled (PECOS I20090807000167); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 200 Exempla Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Connie AkersAmbulatory Care Registered Nurse1619159589
- Jenna Allais, PHARMDPharmacist1487063889
- Jordan Ancmon, DOEmergency Medicine Physician1184284515
- Maria Arenas, CSFASurgical Physician Assistant1306652490
- Kristie ArendPharmacotherapy Pharmacist1528807864
- Ann Aycrigg, NPNurse Practitioner1033235643
Verify Mahasti Kalantar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 40768Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
304 Medicare Part D claims for 123 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Pradaxa19 claims
- Furosemide18 claims
- Pantoprazole Sodium15 claims
- Prednisone15 claims
- Metoprolol Succinate13 claims
- Metoprolol Tartrate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Colorado Permanente Medical Group PCDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mahasti Kalantar among 2,046 internal medicine physician records in Colorado
Mahasti Kalantar, MD is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1996 · median 2006 among the 1,090 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 internal medicine physician records list a practice address in Lafayette
They are 45 of the 1,905 NPPES records with a practice address in Lafayette, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Lafayette → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vincent Bilello, M.D.Lafayette, CO 800261821070756
- Susan Blakley, M.D.Lafayette, CO 800261316932387
- Abby Bleistein, M.D.Lafayette, CO 800261235119553
- Cezary Dobija, M.D.Lafayette, CO 800261639151459
- Lisabeth Hall, MDLafayette, CO 800261376578187
- Ian Lang, DOLafayette, CO 800261184786998
- Lorena Letkomiller, M.D.Lafayette, CO 800261205892239
- Robert McClure, M.D.Lafayette, CO 800261609927367
Common questions
What is Mahasti Kalantar, MD's NPI number?
Mahasti Kalantar, MD's National Provider Identifier (NPI) is 1598865313, issued on Sep 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mahasti Kalantar, MD located?
The NPPES record lists a practice address at 200 Exempla Cir, Lafayette, CO, 80026. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Mahasti Kalantar, MD's license?
NPPES lists Colorado license number 40768, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mahasti Kalantar, MD prescribe under Medicare Part D?
In 2024, Mahasti Kalantar, MD had 304 Medicare Part D claims for 123 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.